JP2015229597A - Method and device for monitoring empty pipe quality - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method capable of finally exerting positive influence even on productivity of a textile machine, by monitoring an empty pipe quality.SOLUTION: In a traverse-winding package manufacturing method, a traverse-winding package (11) is replaced with an empty pipe (28) each time after its completion, and next, a new traverse-winding package (11) is formed by winding a yarn on the empty pipe (28). Before a new start of a winding process, at least one measured value for characterizing eccentricity of the empty pipe (28) is specified, and when an error limit value of at least the one measured value is maintained, the winding process is started.

Description

  The present invention relates to a method for manufacturing a traverse winding package, in which a traverse winding package is replaced with an empty tube each time it is completed, and then a yarn is wound around the empty tube to form a new traverse winding package, and the method is carried out. It is related with the apparatus to do.

  In the context of textile machines for producing twill packages, for example winders, so-called twill package changers have been known for a long time, and various patent specifications, for example EP-A-0 282 105, are hereby incorporated by reference. It is disclosed in the description or in DE 198 36 702 A1.

  Service units are also used in other textile machines that produce traverse packages, such as open-end spinning machines. In addition to the traverse package changer, these service units usually have another operating device, for example an operating device that allows the spinning means to be cleaned or the yarn spun after yarn breakage (Anspinnen). Yes.

  The traverse package exchange device transfers the traverse package that has reached a predetermined diameter to the traverse package transport device unique to the textile machine, and then instead attaches the empty tube from the empty tube magazine to the package frame of the corresponding working unit. Work for.

  For this purpose, the traversing package exchanging device has a wide variety of handling elements used during the exchanging operation of the traversing package and the empty tube. Such handling elements are, for example, frame openers, frame lifters, package guide devices, wound tube supply devices and thread lifters.

  In order to be able to work automatically in the working part of the textile machine when necessary, such a traverse package changer usually uses a traveling mechanism to produce the working part of the textile machine that produces the traversed package. It is arrange | positioned so that it can drive | work on the running track of the machine length arrange | positioned above.

  A traversing package changer for textile machines for producing traversing packages in the form described at the beginning is known from DE-A 19533833. In the case of traverse winding package / empty tube replacement, the yarn still existing between the storage bobbin and the finished traverse winding package is first received by a special handling means of the traverse winding package changer, a so-called yarn lifter. It is determined and cut off by a cutting and clamping device arranged on the lifter. Subsequently, the traverse package is conveyed onto a traverse package conveyance belt disposed behind the working unit, and a so-called empty tube supply device positions a new empty tube on the package frame. At this time, the yarn end connected to the storage bobbin is firmly held and finally applied to the newly installed empty tube to form a base preliminary winding.

  Since many spinners use inexpensive cardboard tubes, it often happens that the edges of the empty tube are more or less strongly deformed. When such a deformed empty tube is mounted on the package frame and the winding unit is started, as soon as a sufficient amount of mass is wound on the empty tube after a certain amount of time has passed, the traverse package dissociates from the package frame. End up. At this time, in many mechanical types, the yarn traverse lever of the winding part may also be damaged or broken.

  An unpublished patent application specification (application number: 103013014195.8) discloses a method and a textile machine that eliminates yarn interruption during winding of a yarn into a twill package. When the yarn breakage occurs immediately after changing the traverse package / empty tube, or when the newly installed empty tube does not start rotating properly and the wound yarn length falls below the determined minimum yarn length. In this case, the winding unit requires replacement of the empty tube. This replacement of the empty tube is performed by a twill-winding package replacement device.

European Patent Application No. 0282105 German Patent Application Publication No. 19836702 German Patent Application Publication No. 19533833 Patent Application No. 102013019195.8

  The object of the present invention is to provide a method and a corresponding device that enable the monitoring of the quality of the tube and can ultimately have a positive influence on the productivity of the textile machine.

  This problem is solved according to the invention by the characteristic configuration of claim 1 for the method and by the characteristic configuration of claim 6 for the device.

  Preferred embodiments of the invention are described in the dependent claims.

  In order to solve the problem, according to claim 1, prior to a new start of the winding process, at least one measurement characterizing the eccentricity of the empty tube is identified and an error limit of the at least one measurement value. If the value is maintained, start the winding process.

  That is, at first, as usual, the full package package is exchanged for a new empty tube by the package package exchange device. After the empty tube has been installed, the empty tube is first rotated, preferably when the traverse package changer already produces a so-called base prewind. A measuring device detects at least one measurement characterizing the eccentricity of the empty tube. This measurement is compared with the tolerance limit.

  If the measured value is within the tolerance limits, this means that the empty tube is not deformed at all or only to an acceptable extent, so that the rotational characteristics of the empty tube are quiet or uniform. And it is acceptable. As a result, the empty tube remains in the package frame and the winding operation starts.

  In this way, the deformed empty tube can be recognized immediately after being mounted on the package frame and before the start of the winding process, and can be eliminated in some cases. This avoids the possibility that the deformed empty tube is supplied to the winding process and the empty tube is dissociated from the package frame after a certain amount of time based on its non-circular rotational characteristics. As a result, machine stoppages and human work input are reduced, which in turn has a positive impact on the productivity of textile machines.

  In the present invention, it is proposed to specify the eccentricity of the empty tube during the formation of the base preliminary winding. This is because it does not require additional time. Theoretically, however, it is also possible to detect the eccentricity by driving the empty tube, for example, before forming the base preliminary winding. However, if this is done, the manufacturing in the working unit, that is, the package forming operation will be interrupted longer than necessary, and it is desirable to avoid this.

  If at least one measurement characterizing the eccentricity of the empty tube is above an acceptable limit, the empty tube is strongly deformed and uniform during the winding process to form a quality package. Rotation characteristics cannot be guaranteed. In the worst case, the empty tube dissociates from the package frame during the winding operation. Therefore, the installed empty tube is removed from the package frame again, and a new empty tube is installed. In this newly installed alternative empty tube, according to the invention, the eccentricity is again measured before the start of the winding process.

  According to a preferred aspect of the present invention, the measurement value for the eccentricity of the empty tube is specified in a non-contact manner.

  The contactless measuring device has the advantage of enabling a measuring process without reaction and wear within a short response time and having a high reproducibility.

  According to the fourth aspect, the measurement value for the eccentricity of the empty tube can be specified using a camera system equipped with image evaluation software.

  This special form of contactless detection is used between the currently installed empty tube and the already detected image of the empty tube to allow evaluation of the eccentricity of the currently installed empty tube. Allows comparison by photo. To enable an unhindered winding process, a very strongly deformed image of the empty tube is stored, or still has no deformation or is acceptable, allowing an unhindered winding process An image of an empty tube having only a slight deformation is stored.

  According to a preferred aspect of the present invention, the measurement value for the eccentricity of the empty tube is specified using a mechanical feeler provided with a limit switch.

  Such an uncomplicated mechanical feeler provides high resistance to factory environments and high reproducibility. The mechanical feeler can be used absolutely reliably even at high operating loads against electromagnetic disturbance effects.

  According to claim 6, the device according to the invention comprises first means for detecting at least one measurement value characterizing the eccentricity, the device further comprising the at least one measurement value. The apparatus is configured to compare with an acceptable limit value, and the apparatus generates a signal that initiates the winding process if the at least one measurement value is maintained at the acceptable limit value.

  As already mentioned, this makes it possible to check the quality of the empty tube before the start of the winding process and to use only empty tubes that guarantee a friction-free winding process and winding process. .

  Preferably, the determination of the eccentricity and the detection of the measurement values characterizing the eccentricity can be incorporated into the already known twill package / empty tube replacement. That is, after the completely wound traverse package is removed from the package frame by the traverse package exchanging device within the normal traverse package / empty tube exchange frame, and the new empty tube is mounted on the package frame, For example, during the formation of the base preliminary winding, the eccentricity of the empty tube is simultaneously measured by the measuring device.

  Thus, the device according to the invention has the advantage that it does not require high-cost modifications in the textile machine and mainly uses the existing machine elements of the textile machine for producing the trawl package.

  According to the invention, it is proposed to measure the eccentricity during the formation of the preliminary winding. This eliminates the need for additional time. The obtained at least one measured value for the eccentricity is compared with the tolerance limit value and, if the tolerance limit value is maintained, a signal is sent to start the winding process.

  In order to be able to detect the measured value and to measure the eccentricity of the empty tube, the measuring device works. This measuring device can be based on a wide variety of measuring principles.

  The eccentricity of the empty tube and thus the quality of the empty tube can be specified in a variety of ways. One possibility is to measure the amplitude of the package frame that directly affects the empty tube. The more deformed the empty tube, the greater the amplitude of the package frame and the non-circular or non-uniform rotation characteristics of the empty tube.

  Another possibility is to evaluate the geometry of the empty tube. That is, an image of an empty tube is taken and this image is compared with a stored image of the empty tube that has been deformed with different strength from an undeformed empty tube. If the deformation of the empty tube exceeds the deformation of the image determined as the limit value, the empty tube must be replaced with a new empty tube in order to ensure a friction-free production.

  In a preferred embodiment as claimed in claim 7, the device according to the invention comprises a second means, which is in the case where the tolerance limit value of at least one measurement value is not maintained, An exchange signal is issued to urge the exchange of an already installed empty tube with another new empty tube.

  After at least one measurement characterizing the eccentricity is detected, this measurement value is then compared with an acceptable limit value. In connection with this comparison, the empty tube remains in the package frame and the winding process is started, or if at least one measured value is above the tolerance limit, an exchange signal is emitted, The traverse package changer removes an already installed empty tube from the package frame and attaches a new empty tube to the package frame.

  In a preferred aspect of the present invention, the first and second means are components of a travelable service unit that replaces the traverse package with an empty tube.

  Preferably, the device according to the invention is arranged in a traverse package changer. This embodiment has the advantage that only one measuring device in the traverse package changer is sufficient to determine the eccentricity by detecting the measured value.

  However, also within the framework of the present invention, the first and second means for determining the degree of eccentricity are arranged in different places, for example in the central empty pipe distributor, and in some cases individually in each work. It is also possible to arrange in parts or in separate places.

  When the central arrangement is selected, it is necessary to additionally provide a device that can be mounted and rotated. In the case of an individual arrangement, each package frame can be used as described above, but in this case, it is necessary to enlarge the working part by the number of measurement cells for detecting the degree of eccentricity. There is.

  In a preferred aspect of the present invention, the first means includes a non-contact type measuring device for specifying a measurement value for the eccentricity of the empty tube.

  Certainly a wide variety of measuring devices are a component of the present invention, but are not fully listed and described within the scope of the present application, and therefore will not be described in detail. A wide variety of non-contact or non-contact measurement principles are known and all these measurement principles are well disclosed by the prior art and are described in detail in very various patent applications .

  As a contactless measurement principle, for example, measurement using a photocell, an inductive sensor, or a laser can be used.

  In the specification of West German Patent No. 1278308, for example, a photoelectric sensor is disclosed. The irradiation of the spinning cup winding tube using a light source is described. At this time, the light reflected from the spinning cup winding tube is detected using a photocell. The light beam reflected from the spinning cup tube will affect the photocell to some degree, depending on whether residual winding is present or absent in the spinning cup tube. Rotating deformed empty tubes also cause reflection deviations, similar to residual windings.

  According to an aspect of the present invention, the first means includes a camera system provided with image evaluation software for specifying a measurement value for the eccentricity of the empty tube.

  Such a measuring device is known from the prior art and is often used in the textile industry and is one of the contactless measuring devices.

  German Offenlegungsschrift 102007057921 describes the automated identification of the empty tube, for example by the characteristic features of the empty tube. Various colors and patterns of the empty tube are recognized, in which case a so-called CCD camera takes an image of the empty tube, and this image is compared with the stored image of the empty tube in the image processor. At this time, asymmetry is recognized instead of the pattern.

  In another preferred aspect, as defined in claim 11, the first means has a mechanical feeler with a limit switch to specify a measurement value for the eccentricity of the empty tube.

  An electromechanical feeler is disclosed, for example, in DE 41 10 626 A1. The apparatus described in this specification has an electromechanical winding tube monitoring device, and this winding tube monitoring device detects the amount of residual yarn remaining in the spinning cup winding tube. For this purpose, the metal cam is brought into contact over the spinning cup winding tube at the side. Depending on how much the metal cam can touch over the spinning cup winding, the residual filling of the spinning cup winding is estimated. Such a feeler can also be used to monitor the amplitude of the surface motion of the empty tube rotating in the package frame.

  Within the framework of the present invention, it is also possible to use a plurality of means for detecting a measurement for the eccentricity of a single empty tube, with the aim of improving the certainty of the results.

It is a front view which shows the winding machine provided with many working parts. It is the schematic which shows the winding part provided with the twill winding package replacement | exchange apparatus which concerns on this invention.

  Next, embodiments of the present invention will be described in detail with reference to the drawings.

  In the following, the present invention will be described with respect to a rewinding machine 1 provided with a number of winding units 2. However, the present invention is also applicable to other textile machines that manufacture traverse packages.

  FIG. 1 schematically shows a rewinding machine indicated by reference numeral 1 in a front view. Such a rewinding machine 1 usually has a number of similar working parts, preferably a winding part 2, between its end frames 35, 36. Although not described in detail in these winding sections 2 because it is known, a spinning cup 9 manufactured in a ring spinning machine (not shown) is wound around a large volume traverse winding package 11.

  The completed traverse package 11 is delivered to the traverse package transport device 21 unique to the textile machine as shown in FIG. 2 using a service unit 23 (hereinafter referred to as a traverse package changer) that operates automatically. And then transported to a package charge station or the like located on the machine end side.

  Such a rewinding machine 1 usually has a supply device (Logistikeinrichtung) formed as a cup / winding tube conveying system 3. In the cup / winding tube transfer system 3, the spinning cup 9 or an empty spinning cup winding tube, that is, an empty tube 34 circulates on the transfer tray 8.

  Further, such a rewinding machine 1 is supplied to, for example, the working unit calculator 39 of each winding unit 2 via the machine bus 40 and the control unit 38 of the traverse package changing apparatus 23 that operates the winding unit 2. A central control unit 37 is connected. The traverse package changing device 23 is supported by the traveling devices 24 and 25 on the traveling tracks 26 and 27 having a machine length disposed above the winding unit 2. The traverse package exchanging device 23 does not only function to properly deliver the traverse package 11 completed in the winding unit 2 to the traverse package transport device 21, but automatically replaces the empty tube 28 each time. It also works for mounting on the package frame 18 of the corresponding winding part 2.

  The traverse package changer 23 takes out the corresponding empty pipes 28 from the empty pipe storage part 22 unique to the working part arranged above the winding part 2.

  The spinning cup 9 having a relatively small yarn volume is rewound onto the large volume traverse package 11 in the feeding section 10 located in the region of the lateral conveying section (not shown).

  FIG. 2 shows a state immediately after the full tube traverse package 11 is replaced with the empty tube 28.

  The empty tube 28 is held by the package frame 18 and is rotatably supported. Then, the yarn is wound around the empty tube 28, and the traverse package 11 is formed. For this purpose, the empty tube 28 or the traverse package 11 is in contact with the drive drum 12 and is rotated by the drive drum 12 by friction. The winding unit 2 further includes a swivelable suction nozzle 14 that captures the upper yarn connected to the traverse package 11 and inserts it into the yarn splicing device 13 when the yarn is interrupted. To do. The lower thread connected to the spinning cup 9 is captured by the pivotable gripper pipe 15 supplied with negative pressure and inserted into the yarn splicing device 13.

  The yarn interruption may occur, for example, by clearer cutting or yarn breakage, or when the spinning cup 9 or the storage bobbin is emptied. The clearer 17 is disposed on the yarn path. The clearer 17 monitors the yarn 20 for defects and, in some cases, performs clearer cutting. At this time, the lower thread is held by the thread tensioner 16 and can be accommodated by the gripper pipe 15. The upper thread is wound on the traverse package 11 and can be captured by the suction nozzle 14. The upper thread and the lower thread are inserted into the splicing device 13 and the splicing is performed. If a thread break occurs above the thread tensioner 16, the operation is performed accordingly for piecing. When the yarn breaks below the yarn tensioner 16 or when a new spinning cup 9 is replaced, the suction bell 19 is first activated to capture the yarn in the spinning cup 9. The lower thread can then be taken over by the gripper tube 15. Thereafter, piecing is performed as already described.

  In order to carry out the traverse package / empty tube exchange, a traverse package exchange device 23 is provided. The traverse package exchanging device 23 serves to deliver the traverse package 11 that has reached a predetermined diameter to the traverse package transport device 21 and then attach the empty tube 28 to the package frame 18 instead. For this purpose, the traverse package changing device 23 can travel along the rewinding machine 1 and is guided along the traveling tracks 26 and 27. The traverse package changer 23 has a number of handling devices, which are only schematically shown in FIG. 2 since they are known in the prior art. Examples of such a handling device include a thread lifter 50, a frame opener 51, an empty pipe supply device 52, and a frame lifter 53. The handling device is driven by an individual drive as is also known. In this way, the handling devices can in principle carry out any inherent movement.

  The winding unit 2 has an empty tube storage unit 22 for storing an empty tube 28 for exchanging a traverse package and an empty tube. However, the empty tube storage unit 22 may be attached to the traverse package exchanging device 23 or may be attached to the center.

  When the traversing package 11 reaches a predetermined diameter in one winding section 2 of the textile machine, the traversing package 11 is lifted from its driving drum 12 by a lifting device unique to the winding section and is braked or not braked. The rotation is stopped.

  At the same time, the traverse winding package exchanging device 23 arranged to travel on the traveling tracks 26 and 27 in the upper structure of the rewinding machine 1 is required to operate. At this time, the operation request of the traverse package changer 23 can be made preventively or in advance, that is, the operation request signal can already be issued before the traverse package 11 reaches its final diameter. .

  As described above, the traverse package exchange device 23 having a handling device for exchanging the completed traverse package 11 with the empty tube 28 is positioned in front of the corresponding winding unit 2. Next, the package frame 18 is opened by the frame opener 51. At this time, the frame arm supported so as to be able to turn is pressed outward. When the package frame 18 is opened, the traversed package 11 held between the package frame arms is released and reaches the swivel plate located below. The swivel plate is supported and lifted from below by the frame lifter 53. As a result, the traverse package 11 is rolled onto the traverse package transport device 21.

  The empty tube 28 is taken out from the empty tube storage unit 22 unique to the working unit using an empty tube supply device (not shown) and is carried into the region of the package frame 18.

  At this time, the package frame 18 is brought by the frame lifter 53 and the frame opener 51 to a position where a winding tube gripper (not shown) can install the new empty tube 28 in the package frame 18 without any problem.

  Next, the thread 20 is fixed to the empty tube 28. For this purpose, the lower thread is conveyed to the area of the package frame 18 using the gripper tube 15 and the suction nozzle 14, and the thread 20 is clamped between the empty tube 28 and the receiving part of the package frame 18. In FIG. 2, the thread lifter 50 is positioned such that a base reserve (Fussreserve) is wound.

  The operations of the winding machine 1, the winding unit 2, and the traverse package exchange device 23 are controlled by the central control unit 37, the working unit calculator 39, and the control device 38 of the traverse package exchange device 23. These control devices are connected to each other via bus lines 40 and 41.

  In accordance with the present invention, the first means detects the amplitude of vibration of the package frame 18 using the measurement cell 31 during the formation of the base preliminary winding, and measures to characterize the eccentricity (Rundlauf) of the mounted empty tube 28 A value is formed. This measured value is transmitted to the working unit computer 39 via the machine bus 40. The measured value is then compared with the limit value and an indication that the allowable limit value has been exceeded is displayed. Based on this, the second means generates an exchange signal, and this exchange signal is transmitted to the control device 38 of the traverse package exchange device 23. In response to this exchange signal, the traversed package exchanging device 23 exchanges the already installed empty tube 28 with a new empty tube 28 from the empty tube storage unit 22. The empty tube 28 having the residual yarn is carried out via the traverse package transporting device 21 and later removed. At this time, the empty tube replacement operation is basically the same as the replacement of the full tube winding package 11 and the empty tube 28 as described above. The fixing of the thread 20 to the empty tube 28 is also performed as described above.

  DESCRIPTION OF SYMBOLS 1 Rewinding machine, 2 Winding part, Working part, 3 Cup and winding pipe conveyance system, 8 Conveying tray, 9 Spinning cup, 10 Feeding part, 11 Twill winding package, 12 Drive drum, 13 Yarn splicing device, 14 Suction nozzle 15 Gripper tube, 16 Yarn tensioner, 17 Clearer, 18 Package frame, 19 Suction bell, 20 Yarn, 21 Twill winding package transport device, 22 Empty tube storage unit, 23 Service unit, Twill winding package changing device, 26, 27 Traveling Orbit, 28 empty pipe, 31 measuring cell, 34 empty pipe, 35, 36 end frame, 37 central control unit, 38 control unit, 39 working section computer, 40 mechanical bus, bus line, 41 bus line, 50 thread lifter, 51 frame opener, 52 Tube feeder, 53 frame lifter

Claims (11)

After the completion of the traversing package (11), the hollow tube (28) is replaced each time, and then a thread is wound around the hollow tube (28) to form a new traverse winding package (11). A way to
Prior to a new start of the winding process, identify at least one measurement characterizing the eccentricity of the empty tube (28);
A method for manufacturing a traverse package, characterized in that a winding process is started when an error limit value of said at least one measured value is maintained.   The method of claim 1, wherein if the tolerance limit of the at least one measured value is not maintained, the empty tube is replaced with another empty tube.   The method according to claim 1, wherein the measurement of the eccentricity of the empty tube is performed in a contactless manner.   The method of claim 1, wherein the measurement of the eccentricity of the empty tube (28) is identified using a camera system equipped with image evaluation software.   The method according to claim 1, wherein the measurement of the eccentricity of the empty tube (28) is performed using a mechanical feeler with a limit switch. The traverse winding package (11) is replaced with an empty tube (28) each time it is manufactured, and then a thread is wound around the empty tube (28) to form a new traverse winding package (11). An apparatus for manufacturing
The apparatus comprises first means for detecting at least one measurement characterizing the eccentricity;
The apparatus is further configured to compare the at least one measured value to an acceptable limit value;
An apparatus for manufacturing a traverse package, wherein the apparatus generates a signal for starting a winding process when the at least one measured value maintains an acceptable limit value.   The apparatus has a second means, which is different from the already installed empty pipe (28) and the other if the tolerance limit of the at least one measured value is not maintained. 7. An apparatus according to claim 6, wherein the exchange signal is transmitted for performing an exchange with a new empty pipe (28).   7. The device according to claim 6, wherein the first and second means are components of a travelable service unit (23) that replaces the traverse package (11) with an empty tube (28).   7. The device according to claim 6, wherein the first means comprises a contactless measuring device for determining a measurement value for the eccentricity of the empty tube (28).   7. The apparatus of claim 6, wherein the first means comprises a camera system with image evaluation software to identify measurements for the eccentricity of the empty tube (28).   7. A device according to claim 6, wherein the first means comprises a mechanical feeler with a limit switch for determining a measurement of the eccentricity of the empty tube (28).

Images